﻿using System;

namespace User.Api.BizExtensions
{
    public static class HospCardExtensions
    {
        /// <summary>
        /// 就诊卡类型整形转就诊卡类型名称，0诊疗卡 1健康卡 2市民卡
        /// </summary>
        /// <param name="type">类型代码</param>
        /// <returns></returns>
        public static string ToCardTypeName(int? type)
        {
            if (type == 0)
            {
                return "诊疗卡";
            }
            if (type == 1)
            {
                return "健康卡";
            }
            if (type == 2)
            {
                return "市民卡";
            }

            return "";
        }

        /// <summary>
        /// 验证身份证号码
        /// </summary>
        /// <returns></returns>
        public static bool IsValidCertNo(string certNo, out DateTime birthDt, out string sex)
        {
            birthDt = new DateTime();
            sex = "M";

            int intLen = certNo.Length;
            long n = 0;

            if (intLen == 18)
            {
                if (long.TryParse(certNo.Remove(17), out n) == false || n < Math.Pow(10, 16) || long.TryParse(certNo.Replace('x', '0').Replace('X', '0'), out n) == false)
                {
                    return false;//数字验证
                }
                string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
                if (address.IndexOf(certNo.Remove(2), StringComparison.Ordinal) == -1)
                {
                    return false;//省份验证
                }
                string birth = certNo.Substring(6, 8).Insert(6, "-").Insert(4, "-");
                if (DateTime.TryParse(birth, out birthDt) == false)
                {
                    return false;//生日验证
                }

                bool isMale = certNo.Substring(16, 1).ToInt32().IsOdd();
                if (isMale)
                {
                    sex = "M";
                }
                else
                {
                    sex = "F";
                }

                string[] arrVarifyCode = ("1,0,x,9,8,7,6,5,4,3,2").Split(',');
                string[] Wi = ("7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2").Split(',');
                char[] Ai = certNo.Remove(17).ToCharArray();
                int sum = 0;
                for (int i = 0; i < 17; i++)
                {
                    sum += int.Parse(Wi[i]) * int.Parse(Ai[i].ToString());
                }
                int y = -1;
                Math.DivRem(sum, 11, out y);
                if (arrVarifyCode[y] != certNo.Substring(17, 1).ToLower())
                {
                    return false;//校验码验证
                }
                return true;//符合GB11643-1999标准
            }
            else if (intLen == 15)
            {
                if (long.TryParse(certNo, out n) == false || n < Math.Pow(10, 14))
                {
                    return false;//数字验证
                }
                string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
                if (address.IndexOf(certNo.Remove(2), StringComparison.Ordinal) == -1)
                {
                    return false;//省份验证
                }
                string birth = certNo.Substring(6, 6).Insert(4, "-").Insert(2, "-");
                if (DateTime.TryParse(birth, out birthDt) == false)
                {
                    return false;//生日验证
                }
                return true;//符合15位身份证标准
            }
            else
            {
                return false;//位数不对
            }
        }        
    }
}